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/*
* Copyright © 2009 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* Authors:
* Chris Lord <chris@openedhand.com>
* Eric Anholt <eric@anholt.net>
*
*/
/** @file s3tc-teximage.c
*
* Tests that a full S3TC-compressed mipmap tree can be created and
* used.
*/
#include "piglit-util-gl-common.h"
PIGLIT_GL_TEST_CONFIG_BEGIN
config.window_width = 500;
config.window_height = 600;
config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DOUBLE;
PIGLIT_GL_TEST_CONFIG_END
#define SIZE 128
const float red[4] = {1.0, 0.0, 0.0, 1.0};
const float green[4] = {0.0, 1.0, 0.0, 1.0};
const float blue[4] = {0.0, 0.0, 1.0, 1.0};
const float white[4] = {1.0, 1.0, 1.0, 1.0};
static void
display_mipmaps(int start_x, int start_y)
{
int i;
glEnable(GL_TEXTURE_2D);
/* Disply all the mipmap levels */
for (i = SIZE; i > 0; i /= 2) {
glBegin(GL_QUADS);
glTexCoord2f(0.0, 0.0); glVertex2f(start_x + 0, start_y + 0);
glTexCoord2f(1.0, 0.0); glVertex2f(start_x + i, start_y + 0);
glTexCoord2f(1.0, 1.0); glVertex2f(start_x + i, start_y + i);
glTexCoord2f(0.0, 1.0); glVertex2f(start_x + 0, start_y + i);
glEnd();
start_x += i + 5;
}
}
static GLuint
create_texture(GLenum format)
{
GLfloat *data;
int size, x, y, level;
GLuint tex;
glGenTextures(1, &tex);
glBindTexture(GL_TEXTURE_2D, tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_NEAREST);
data = malloc(SIZE * SIZE * 4 * sizeof(GLfloat));
for (level = 0, size = SIZE; size > 0; level++, size >>= 1) {
for (y = 0; y < size; y++) {
for (x = 0; x < size; x++) {
const float *color;
if (size == 4)
color = red;
else if (size == 2)
color = green;
else if (size == 1)
color = blue;
else if (x < size / 2 && y < size / 2)
color = red;
else if (y < size / 2)
color = green;
else if (x < size / 2)
color = blue;
else
color = white;
memcpy(data + (y * size + x) * 4, color,
4 * sizeof(float));
}
}
/* Create empty texture */
glTexImage2D(GL_TEXTURE_2D, level, format,
size, size, 0,
GL_RGBA, GL_FLOAT, NULL);
glPixelStorei(GL_UNPACK_ROW_LENGTH, size);
/* Fill in sub regions of texture */
if (size <= 4) {
glTexSubImage2D(GL_TEXTURE_2D, level,
0, 0, size, size,
GL_RGBA, GL_FLOAT, data);
} else {
float *reds = data;
float *greens = data + size / 2 * 4;
float *blues = reds + (size / 2) * size * 4;
float *whites = blues + size / 2 * 4;
glTexSubImage2D(GL_TEXTURE_2D, level,
0, 0,
size / 2, size / 2,
GL_RGBA, GL_FLOAT, reds);
glTexSubImage2D(GL_TEXTURE_2D, level,
size / 2, 0,
size / 2, size / 2,
GL_RGBA, GL_FLOAT, greens);
glTexSubImage2D(GL_TEXTURE_2D, level,
0, size / 2,
size / 2, size / 2,
GL_RGBA, GL_FLOAT, blues);
glTexSubImage2D(GL_TEXTURE_2D, level,
size / 2, size / 2,
size / 2, size / 2,
GL_RGBA, GL_FLOAT, whites);
}
}
free(data);
return tex;
}
static GLboolean
check_resulting_mipmaps(int x, int y)
{
GLboolean pass = GL_TRUE;
int size;
for (size = SIZE; size > 0; size /= 2) {
if (size == 4)
pass = pass && piglit_probe_pixel_rgb(x + 2, y + 2,
red);
else if (size == 2)
pass = pass && piglit_probe_pixel_rgb(x + 1, y + 1,
green);
else if (size == 1)
pass = pass && piglit_probe_pixel_rgb(x, y,
blue);
else {
pass = pass && piglit_probe_pixel_rgb(x + size / 4,
y + size / 4,
red);
pass = pass && piglit_probe_pixel_rgb(x + size * 3 / 4,
y + size / 4,
green);
pass = pass && piglit_probe_pixel_rgb(x + size / 4,
y + size * 3 / 4,
blue);
pass = pass && piglit_probe_pixel_rgb(x + size * 3 / 4,
y + size * 3 / 4,
white);
}
x += size + 5;
}
return pass;
}
enum piglit_result
piglit_display(void)
{
GLuint tex;
GLboolean pass = GL_TRUE;
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT);
tex = create_texture(GL_COMPRESSED_RGB_S3TC_DXT1_EXT);
display_mipmaps(10, 10 + (10 + SIZE) * 0);
glDeleteTextures(1, &tex);
tex = create_texture(GL_COMPRESSED_RGBA_S3TC_DXT1_EXT);
display_mipmaps(10, 10 + (10 + SIZE) * 1);
glDeleteTextures(1, &tex);
tex = create_texture(GL_COMPRESSED_RGBA_S3TC_DXT3_EXT);
display_mipmaps(10, 10 + (10 + SIZE) * 2);
glDeleteTextures(1, &tex);
tex = create_texture(GL_COMPRESSED_RGBA_S3TC_DXT5_EXT);
display_mipmaps(10, 10 + (10 + SIZE) * 3);
glDeleteTextures(1, &tex);
pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 0);
pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 1);
pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 2);
pass = pass && check_resulting_mipmaps(10, 10 + (10 + SIZE) * 3);
piglit_present_results();
return pass ? PIGLIT_PASS : PIGLIT_FAIL;
}
void
piglit_init(int argc, char **argv)
{
piglit_require_extension("GL_EXT_texture_compression_s3tc");
piglit_ortho_projection(piglit_width, piglit_height, GL_FALSE);
}
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